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APPLE FIRST COVER SPRAY1

Effectiveness rating: E = excellent, G = good, F = fair


Disease Effectiveness Suggested Chemicals 100 gal Dilute Acre Concentrate
Scab E = 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 19, 20, 21 2. Captan 50W 1.5 lb 6.0 lb
  G = 2, 13 3. Rubigan 1E + Captan 50W 3 fl oz + 1 lb 9 fl oz + 3.25 lb
  F = 22 4. Rubigan 1E + Dodine 65W 3 fl oz + 4 oz 8-9 fl oz + 1 lb
Powdery mildew2 E = 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 19, 20, 21, 24 5. Rubigan 1E + Ziram 76DF or WDG 3 fl oz + 1 lb 9 fl oz + 3.25 lb
  G = 14, 15, 16, 17, 22 6. Rubigan 1E + mancozeb 75DF 3 fl oz + 1 lb 9 fl oz + 3 lb
Rusts E = 5, 6, 7, 8, 9, 10, 11, 12, 15, 16, 17, 21 7. Rubigan 1E + Polyram 80DF 3 fl oz + 1 lb 9 fl oz + 3 lb
   G = 3, 4, 13, 14 8. Rally 40WSP + Captan 50W 1.25-2.0 oz + 1 lb 5.0-7.5 oz + 3.25 lb
 
9. Rally 40WSP + Dodine 65W 1.25-2.0 oz + 4 oz 5.0-7.5 fl oz + 1 lb
Fire blight3 E = 23 10. Rally 40WSP + Ziram 76DF or WDG 1.25-2.0 oz + 1 lb 5.0-7.5 fl oz + 3.25 lb


11. Rally 40WSP + mancozeb 75DF 1.25-2.0 oz + 1 lb 5.0-7.5 oz + 3 lb
 
12. Rally 40WSP + Polyram 80DF 1.25-2.0 oz + 1 lb 5.0-7.5 oz + 3 lb
 Rots and frogeye leaf spot  G = 2, 13, 19, 20 13. Ziram 76DF or WDG 2 lb 6.5 lb
   F = 3, 5, 6, 7, 8, 10, 11, 12 14. Procure 50WS + captan 50W 3.0 oz + 1 lb
    15. Procure 50WS + mancozeb 75DF 3.0 oz + 1 lb 12.0 oz + 3 lb
    16. Procure 50WS + Polyram 80DF 3.0 oz + 1 lb 12.0 oz + 3 lb
    17. Procure 50WS + ziram 76DF or WDG 3.0 oz + 1 lb 12.0 oz + 3.25 lb
    19. Sovran 50WG 10-16 oz 4.0-6.4 oz
    20. Flint 50WG -- 2.0-2.5 oz


21. Bayleton 50DF + Dodine 65W 0.5-1 oz + 8 oz 2-4 oz + 1.5 lb


22. Sulfur 2-3 lb 7-10 lb


23. Streptomycin 0.3 lb 1.2 lb


24. Triadimefon 50DF 0.5-1 oz 2-4 oz

1 CAUTION: Do not extend the interval between sprays more than 7 days. See cautions under 1/4-1/2 inch green spray against using captan with oil. See cautions under petal fall spray, page 39, about scab and mildew control. In rust problem areas, maintain control for rusts until spore horns on cedar galls no longer expand when wetted.

2 Excellent powdery mildew control is expected when the Nova or Rubigan is used on a 7-10 day interval for scab control. Triadimefon should give similar mildew control when applied on a 7-10 day schedule. See also comments about disease management in Table 6. Do not combine sulfur with oil or apply within 14 days of an oil spray. Do not apply more than 24 oz of Bayleton 50DF per acre per season.

3 Streptomycin applications can reduce the incidence of fire blight in green shoots during the early cover spray period. It does not effectively reduce spread in woody shoots. Do not apply streptomycin to apples closer than 50 days to harvest. Observe the 50-day application timing on summer cultivars such as Lodi, Yellow Transparent and Gala. Where fire blight blossom and/or shoot infections are being removed during the early season cover spray period, apply streptomycin 1-3 days prior to cutting cankers. In cutting out blight infections, pruning equipment should be sterilized and all pruned cankers should be removed from the orchard. This operation may need to be repeated on a weekly basis. Better results are achieved if the pruning operation is conducted during dry weather. Good potato leafhopper control may help to reduce the spread of shoot blight. See pink and bloom spray for information about use of Apogee for shoot blight management.
 
 


APPLE FIRST COVER SPRAY 1

Effectiveness rating: E = excellent, G = good, F = fair


Insects/Mites Effectiveness Suggested Chemicals 100 gal Dilute Acre Concentrate
 Curculio (PC) E = 2, 3, 13
 1. Lannate 90SP 4 oz 12 oz

G = 10, 11, 12, 22, 27
 2. Guthion 50W 8-10 oz 1.5-2 lb
 Mites (ERM)2 E = 4, 5, 9, 14, 24, 25, 26, 28
 3. Imidan 70WSB 16-21 oz 3-4 lb
  G = 8, 15, 20, 23
 4. Apollo 42SC -- 4-8 fl oz
    5. Savey 50DF or Onager 1EC
 -- 3-6 oz or 12-24 fl oz
White apple leafhopper (WALH) E = 1, 10, 11, 12, 19, 27
 6. Aza-Direct  --  1 qt
  G = 7, 8, 9, 13, 16, 18, 19
 7. Thionex 50WP or 3EC 1 lb or 21 fl oz 3 lb or 4 pt
Codling moth (CM)3 E = 2, 3, 29, 34, 37
 8.5Vydate 2L 1 pt 3 pt
  G = 1, 6, 10, 12, 13, 16, 18, 20, 21, 33, 36
 9. 6Agri-Mek, Abba or Temprano 0.15EC 2.5-5 fl oz 10-20 fl oz
Periodical cicada (C)12 G = 1, 10, 16, 18, 22
 10. 4Assail 30SG  -- 2.5-8.0 oz


11. Actara 25WG
 --
 2.0-5.5 oz


12. Calypso 4F
 1-2 fl oz
 4-8 fl oz
 Green aphid (SA/AA) E = 10, 11, 12, 17, 19, 27, 35
 13. Avaunt 30WDG -- 5-6 oz
  G = 1, 7, 8
 14. 7Nexter 75WP
 -- 4.4-5.2 oz


15. Vendex 50W 6 oz 18 oz
 Oriental fruit moth (OFM)3 E = 30, 31, 32 16. 9Sevin 50W 2 lb 6 lb


17.  Beleaf 50SG --
 2-2.8 oz
    18. 9Sevin XLR PLUS 2 ptz 6 pt
    19. 10Provado or Pasada1.6F 1-2 fl oz 4-8 fl oz
    20. 11Ultra-Fine oil 2 gal -
    21. Intrepid 2F -- 8-16 fl oz
    22. Surround WP 25 lb --


23. Acramite 50WS -- 12-16 oz


24. Zeal 72WDG
 --
 2-3 oz


25. Portal 5EC
 10 fl oz
 2 pt


26. Kanemite 15SC -- 31 fl oz


27. Clutch 50WG
 -- 3 oz


28. Envidor 2SC
 -- 16-18 fl oz


29. 11Rimon 0.83EC
 -- 20-40 fl oz


30. Isomate M100 not a spray --


31. CheckMate OFM-F
 -- 1.3-2.9 fl oz


32. Disrupt OFM not a spray --


33. CM virus
 --
 6.8-13.5 fl oz (Carpovirusine)
3-6 fl oz (Cyd-X)


34.  Delegate 25WG
 --
 4.5-7 oz


35.  Movento 2SC
 --
 6-9 fl oz


36. Belt 4SC
 --
 3-5 fl oz


37. Altacor 35WDG
 --
 2.5-4.5 oz

1 The insects listed under the petal fall spray will still be present if they were not controlled at the optimum time during petal fall. Pest development varies with the conditions of each season. Temperature is a major factor, and a pest may appear as much as two weeks earlier or later in any two successive years. Monitor orchards carefully to determine pest development and best time to spray. In this guide, the first cover spray follows petal fall by 10-14 days and each successive spray interval is assumed to be 10-14 days.

2 Mites develop resistance quickly. Rotate materials; avoid using the same or related compounds repeatedly.

3 See notes on mating disruption, and See note, p. 363.

4 2.5-4.0 oz/A for WALH and SA/AA; 5.5-8.0 oz/A for PC and CM. Addition of 0.5% oil will improve control of CM if using less than 8.0 oz/A. 

5 Likely to thin fruit when used at this time.

6 See comments on p 33.

7 See comments on p 38.

8 See footnote (12), p. 57

9 Lower rate is effective against WALH.

10 See footnote (15), p. 57.

11 See note on CM and OFM on p. 1 for timing recommendations based on DD.

12 Although postbloom applications of pyrethroids are not recommended, they are the most effective materials for control of periodical cicada.


 
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Web Site Author:Alan R. Biggs and Douglas G. Pfeiffer